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// GrowthX Pro · Chrome extension
In testingComing soon

Show up every day.
Through the flat before the curve.

GrowthX Pro is the daily loop on X: reply with something useful after you read, share what you saved when it is worth posting. Side panel plus ✦ on selected text — AI drafts, you copy or Fill on tap, then send.

Engage, create. GrowthX Pro helps you draft; you keep the thinking. Highlight text on X, copy your draft or tap Fill in an open composer — you edit and send. No timeline scraping, no auto-post.

0Day one100Still flat5,000The bendHERE WE AREGROWTHX · FLAT PHASE
Exponential growth looks flat for a long time. This tool is for showing up every day until the curve bends.
// Daily loop

Engage → Create

Two steps, one habit. Engage on days you read something worth answering. Create when a saved signal is ready to share. Both live in the same side panel on X.

Daily

Useful replies without the blank-box stare

Reply with value

You already read the post. GrowthX Pro adds your take and what your work can offer, then returns a few reply angles that mix your experience with the author's point — not generic filler.

~3 minTypical loop
AlwaysYou send
Highlight onlyReads
Without

Stare at an empty reply box, or paste AI slop that could sit under any thread.

With GrowthX Pro

Start from what you read. Ship a reply that sounds like you showed up on purpose.

// In the extension

  1. 1
    Highlight on X

    Select the sentence that caught you. ✦ Engage appears in context — no timeline scan.

  2. 2
    Add your take

    One line on what you know or what your product can offer. Optional Brand Kit keeps the voice yours.

  3. 3
    Copy or Fill

    Pick a draft, edit in the reply box, send yourself. Fill inserts only when you tap. Typical loop: a few minutes, not twenty.

// Tip
✦ Engage runs on text you select — not your whole timeline. No password, no auto-post.

You always send. Copy a draft, or tap Fill to insert into an open composer — never auto-post or auto-reply.

// Reply angles

Same post, different reply

Each angle is a reply strategy, not a tone swap. Read first. Pick an angle. Edit before you send.

Pick an angle
Validate, then extend

Principle · Start from what they got right. Add one concrete step they left out.

Value · Shows you read it. Avoids empty agreement.

Example reply · to @whatmasonbuilds

this. we stopped matching competitor feature pages and just shipped the one workflow our first 8 users kept asking for. pipeline got quieter and denser.

// Field note · Builder
“I built GrowthX for myself first. I was not trying to reply faster. I wanted help saying something useful after I had actually read the post: my experience, my work, and a few angles that still sounded like me.”

Mason · Heavy user · builder · @whatmasonbuilds

// Product values

A good tool should feel easy to hold.

We want GrowthX to fit into how you already work on X, and to leave you a little sharper each day. We built it for our own loop first, not to maximize reply volume.

01
Built for ourselves first

GrowthX started on the founder account. The habit was simple: read a post, add what we know and what our work can offer, then ask for a few reply angles that mix that experience with the author's point. We wanted to become useful in the replies, not just more present.

02
Read first, reply second

Someone wrote that post. They deserve a real read. GrowthX works best after you have taken the post in. It gives you more ways to say what you already think. It does not do the reading for you.

03
AI assists. You decide.

We push back on AI slop: comments that could sit under any thread. GrowthX never auto-posts or auto-fills without your tap. Copy, edit, Fill if you choose, send — you stay in control.

// Against AI slop
Help with the draft. Keep the thinking yours.AI can help you find a clearer angle. It should not replace your judgment, your voice, or the respect you owe the person who posted. Use GrowthX when you already have something to say. What we care about is that you show up as someone worth talking to.

More comments is not the goal. Showing up as a clearer, more useful version of yourself on X is.

// Why this exists
Better judgment beats a higher reply count.GrowthX keeps the loop small: reply with something useful, share what you saved. Side panel plus ✦ on selected text, until both steps feel like habit instead of willpower. AI helps with the draft. You stay the author.
// Why daily
A habit, not a feature stack.Growth on X is a daily job, but not two equal chores every day. Engage most days; Create when you have something worth sharing. GrowthX keeps each step small enough to repeat until it sticks.
// Signal library

Your saves follow you.

01
Save from ✦

Highlight post text on X → ✦ Engage → Save to Signals. Hooks and angles land in your local Signal Library, with tags you can filter later.

02
Engage reuses them

Draft replies with your input first. Optional Brand Kit and related Signals raise the odds you sound like you, with incremental value instead of generic AI.

03
Create shows the source

Turn a saved Signal into a build-in-public draft. You see where it came from; you copy, edit, and post yourself.

AI suggests angles. You read, edit, copy, and confirm every send.

// Pricing

Cloud subscription. BYOK optional.

7-day free trial after sign-in: 30 hosted Cloud credits, or connect your own API key for unlimited drafts during the trial. No card until you choose Cloud monthly or yearly.

What you get
  • Engage

    Highlight text on X, add your take, get reply angles. Copy or Fill into an open composer — you always send.

  • Create

    Turn saved Signals into drafts with the source attached. Copy or Fill when you are ready — you publish.

  • Signal Library

    Save hooks and angles from ✦ Engage. Stored locally on your device; filter by tag when drafting.

  • Brand Kit

    Voice, audience, and product context in Settings so drafts sound like you — not generic AI.

  • Human in the loop

    GrowthX never auto-posts or auto-replies. Fill runs only when you tap to insert a draft you chose.

  • Cloud AI + BYOK

    Cloud includes 300 hosted AI credits per month. Add your own API keys in Settings anytime — as fallback when credits run out, or as your preferred path.

Cloud · hosted AI
Monthly
$12/ month

300 Cloud credits per month. No API key setup. Resets each billing month.

Yearly
Best value
$69/ year

Same 300 credits per month. Save about 52% vs twelve monthly payments.

After sign-in, open Account & plan in the side panel: Cloud monthly ($12) or Cloud yearly ($69). Add BYOK keys anytime in Settings.

Payments by Stripe. Card data never touches our servers. Cloud subscriptions renew until canceled. BYOK keys are optional in Settings — no separate purchase required.

// Get started
In testingComing soon
01

Install GrowthX

Add GrowthX Pro from the Chrome Web Store when the listing is live. Open any X page to start.

02

Sign in

Use your email and the verification code from your inbox. No password.

03

Start your 7-day trial

Use 30 Cloud credits during your trial, or connect your API key in Settings for unlimited trial drafts.

04

Choose Cloud

Account & plan: Cloud monthly ($12) or Cloud yearly ($69). Add BYOK keys anytime in Settings.

// Build in public

Follow the ship log on X

GrowthX runs on the founder account every day. Follow the ship log while we build in the open.

Heavy user first. Builder second.

Follow @whatmasonbuilds →
// FAQ

Terms · Privacy

// Early access

Join the GrowthX waitlist

Get notified when the Chrome Web Store link goes live, plus product updates while we ship.

One email a week. Unsubscribe any time.